Windshield wiper



Nov. 26, 1929. A. MESI WINDSHIELD WIPER Filed Aug. 9. 1926 2 Sheets-Sheet W w b 4 INVENTOR ATTORNEY Nov. 26, 1929. A. MES] ,7 3

' WINDSHIELD WIPER Filed Aug. 9, 1926 2 Sheets-Sheet 2 5 w AA, 1

&3 ATTORNEY Patented Nov. 26, 1929 UNITED STATES ARVI MESI, OF CHICAGO, ILLINOIS WINDSI-IIELD WIPER Application filed. August 9, 1926. Serial No. 128,224.

This invention relates to window cleaning devices and more particularly to that type of device which is adapted to be operated by power actuated means for removing snow or moisture from the outside surface of a window or wind shield of a car or the like and has for its principal object the provision of a simple, inexpensively constructed and efficient window cleaning device of this char- 1G acter which is automatic in operation.

Other objects will appear hereinafter.

The invention consists in the combination and arrangement of parts to be hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings illustrating the preferred form of my invention, and in which:

Fig. 1 is a fragmentary outer face elevaso tional View of a wind shield illustrating the invention associated therewith and showing a housing embodied in the invention in section.

Fig. 2 is a vertical longitudinally extend- 25 ing sectional view through the housing illustrated in Fig. 1 showing the operating mechanism embodied in the invention.

Fig. 3 is a fragmentary sectional detail.

view taken substantially on line 33 of 20 Fig. 1.

Fig. 4 is a sectional detail view taken substantially on line 4-4 of Fig. 1.

Fig. 5 is a sectional detail view taken substantially on line 55 of Fig. 2.

Fig. 6 is a sectional detail view taken substantially on line 66 of Fig. 2.

Fig. 7 is a fragmentary sectional detail view taken substantially on line 77 of Fig. 1.

Fig. 8 is an enlarged sectional detail view of the left hand portion of the invention as illustrated in Fig. 1 of the drawings.

Fig. 9 is a fragmentary sectional detail view taken substantially on line 9-9 of Fig. 2.

To accomplish the various objects of my invention I provide a housing 10 which is secured to the side frame members 11 through the medium of screw members 12 which at tach brackets 13 carried by the housing to 50 the side frame members 11 of the wind shield 14. This housing 10 defines a longitudinally extending slot 15 for reasons hereinafter set 16 having end walls 17 which frictionally fit within the housing 10 which housing 10 and end walls 17 are substantially square shaped in cross section. The end walls 17, as shown in Fig. 2 of the drawings, have central counter bores 18 formed therein for the reception of the end portions 19 of the cylinder barrel 20 and for spacing the outer walls of the cylinder barrel from the inner surfaces of the walls defining the housing 10. Slidably associated with the cylinder barrel 16 is a carriage 21 likewise substantially square shaped in cross section and this carriage 21 carries the shank 22 of a squeegee 23 which is adapted to reciprocate across the outer surface of a glass of the wind shield 14. The shank 22 projects through the longitudinally extending slot 15 and is adapted to work longitudinally within this slot.

The end walls 17 define central openings 24 and 24' through which operating cords 25 and 26 are passed. The inner end portions 27 of these operating cords are connected to a binding screw 28 as at 29. This binding screw 28 is included as a part of the structure of a piston 30 of any approved construction. The cord.25 extends through the opening 24 and passes over a roller 31 supported by a bearing bracket 32 carried by the adjacent end wall 17 Fig. 1. From this roller 31 the cord 25 retracts its course longitudinally of the cylinder and barrel 16 and has its end portion 33 connected as at .34 to the carriage 21. The cord 26 extends through the opening 24 and over a pulley 35 likewise carried by a bearing bracket 36 carried by the adjacent end wall 17 The cord 26 extends from the pulley 35 in a retroactive direction longitudinally of the cylinder barrel 16 and is connected to the carriage as at 34, Fig. 1.

The operation of the invention thus far described is such that upon movement of the piston 30 within the cylinder barrel 16 pull will be exerted on the cord in the direction of movement of the piston. This pull will be transmitted by the cord to the carriage 21 and the carriage will move in the direction of pull of the cord thereon longitudinally ofthe cylinder barrel 16 and it is manifest that, dueto the manner in which the cord 26 is arranged, this movement oi the carriage 21 will be in a direction opposite to the direction of movement of the piston 30. This movement of the carriage manifestly will impart iovement oi the squeegee 23 transversel over the outer surface of the glass of the wind shield 14. Movement of the piston 30 in an opposite direction will impart pull on the cord in the direction of movement of the piston and this pull will be transmitted to the carriage 21 and move this carriage longitudinally of the cylinder barrel 16 in an opposite direc- Lion to that set forth above and likewise move the squeegee 23 in a retroactive direction over the outer surface of the glass of the wind shield.

The means for operating the piston 30 includes a valve structure 3? which is positioned within and at one end portion of the housing 10. This valve structure 3'7 includes a body 38 defining a valve chamber 39 and a passage 40 in communication with the intalre manifold 41 of an int rnal combustion engine (not shown) through the medium of a conductor pipe 42, The body 38 further defines passages 43 and 44 in a communication with the interior or" the cylinder barrel 16 through the medium of tubes 43 and 44 respectively. The tube 43 communicates with the interior of the cylinder barrel 16 at one end thcreoi whereas the tube 44 communicates with. the opposite end of the cylinder barrel 16 as at 45. Confined in the valve chamber 39 is slidable valve member 46 including a valve head 47 having a passage 48 formed therein. The valve head 47 is adapted under certain conditions to close communication between the valve chamber 39 and the passage 43 and open communicationbetween the passage 44 and intake port 42 through the passage 48. Again this valve head is adapted under certain conditions to open communication between the })assage 44 and the valve chamber 39 and open commiuiication between the passage 43 and the exhaust port 48. When communication is permitter between the inlet port 42 and valve chamber 39 communication between the exhaust port 48 and the valve chamber 39 is closed by the valve head 47. This con struction is such that the portin the direction of movement oi the valve head will be open to permit the entrance of air to the cylinder at one side of the piston. The intake port 42 communicates with the atmosphere and, therefore, when the valve head 47 is closing communication between the valve chamber 39 and the passage 43 and is establishing communication between the valve chamber 39 and the passage 44 it is manifest that a partial vacuum will be created on the side of the piston 30 communicating with the manifold of the engine through pipe 44, pas sage 44, valve member 39, passage 40, and pipe 42, and air pressure from the atmosphere will be impressed on the other side of the piston 30 through port 42, passage 43, and pipe 43. llhen the valve head 42 shifts the just descril ed condition will be reversed and, therefore, air pressure wi l be applied on the other side of the piston 39 (the side on which a partial vacuum was drawn as above do scribed) while a partial vacuum will be drawn on the other side. It is, therefore, apparent that the passages 43 and 44 alternately serve as intake and exhaust passages.

he mechanism for operating the valve member 46 includes a slide bar 49 having end portions 50 angled substantially at right with respect to the intermediate portion 51 of this slide bar and these end portions 50 are connected to the end portions of the valve stem 52, Fig. 2. The slide bar 49 is slidably received in a groove 53 formed in the body 38 and this slide bar includes aligned opposite spaced fingers 54 and 55 which are disposed. in parallel relation with the face 56 of the body 38. The end portions 5? oi the fingers 54 and 55 have end ed es 58.

which taper upwardly andoutwardly as best shown in 8. These tapered end edges 58 are adapted for engagement with operating arm 59 pivot-ally connected to the body 38 at 60. This operating arm 59 is connect-ed to one end portion of a link 61 through the medium of a pintle 62. Connected to this pintle 62 is an end portion 63 of an actuating spring 64 having an opposite end portion connected to a lug 65 defined by the housing 10. The spring 64 functions to complete pivotal movement of the operating arm 59 when this op-rating arm is disposed past dead center of its pivotal movement.

The link 61 is connected as at 66 to one end portion of a wire length 67 slidable through openings 68 formed in the end walls 17. At each end portion of this wire length are dis posed inwardly of the end walls 17 stop collars 69 and 70. These stop collars are adapted to be engaged by the carriage 21 as it complctes its final movement longitudinally of the cylinder barrel 16.

Passage through the conductor pipe 42 is controlled bya suitable valve 40.

The operation of the piston is as follows As shown in Fig. 2 071' the drawings the valve head 47 is disposed to open communication between the cylinder barrel 16 to the lett of the piston 30 and the valve chamber 39 and between the conductor pipe 42 and the valve chamber 39 whereas the passage 48 of th valve head 47 is disposed to open communication between the inlet port 42 and the cylinder barrel 16 to the right hand side of the piston 30 for the admission of atmospheric air to this portion of the cylinder barrel.

Vhen the valve head is in this position the suction obtained in the engine manifold 41 creates a partial vacuum in the cylinder barrel to the left of the piston 30 which coacts with the atmospheric pressure on the other side of the piston 30 to cause this piston 30 to move longitudinally within the cylinder barrel in the direction of the partial vacuum side of the cylinder barrel. As this piston moves in this direction it moves the carriage in the opposite direction and prior to the final movement of the carriage the carriage will engage the stop collar 70 and this stop collar 70 when engaged by the carriage will impart slidable movement to the wire length in the direction of movement of the piston. As movement is imparted to the wire length in this direction it acts upon the link 61 to pivot the arm 59 about its pivot 60. Final pivotal movement of the arm 59 is completed by the actuating spring 64 and prior to the final pivotal movement of this arm 59 the end portion 59 will engage the bevelled edge 58 of the finger and impart slidable movement to the slide bar 49. Slidable movement of the slide bar 49 imparts slidable movement to the valve stem 52 to shift the valve head 47. When shifted the valve head 47 is disposed to open communication between the passage 40 and the cylinder barrel 16 to the right of the piston 30 and to close communication between the passage 43 and inlet ports 42 and close communication between the passages 40 and 44 and open communication between the intake port l8 and this passage 44; for the admission of atmospheric air to the left hand side of the piston 30. Under these conditions when a partial vacuum is created to the right of the piston 30 this partial vacuum will coact with the atmospheric pressure to move the piston 30 and carriage in an opposite direction until the carriage has shifted the wire length 67 by engagement thereof with the stop collar 69. lVhen this stop collar 69 is engaged by the carriage the wire length will be moved in an opposite direction to impart operation through the medium of the link 61 to the arm 59 which will pivot about the pivot in an opposite direction to that herein indicated. Prior to the complete pivotal movement of the arm 59 in this opposite direction the end portion 59 thereof will engage the bevelled edge 57 of the finger 54 and shift the slide plate 49 to impart slidable movement to the valve stem 52 in an opposite direction to dispose the valve heads again in the position illustrated in Fig. 2 where the operation is again repeated as above indicated. I

\Vhile I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variations and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifieations as come within the scope of the appended claim.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

In combination with a cylinder, a piston operable in the cylinder, a carriage slidably asociated with the cylinder, conduits in communication with the cylinder on opposite sides of the piston, a conduit in communication with the intake manifold of an internal combustion engine, a valve structure in communication with a conduit and the conduits for alternately placing the cylinder in communication with the conduits, means for op erating said valve member by the operation of said carriage, said last mentioned means including a slide plate operative'ly connected to opposite end portions of the valve member and having opposite fingers defining end portions disposed in spaced relation with respect to each other and bevelled outwardly and upwardly from their lower edge portions, a pivotally mounted operating member carried by the body adapted for alternate engagement with the bevelled end portions, a spring member acting upon said operating member for completing final pivotal movement of the operating member, and means having operative connection with the operating member and slidably associated with the cylinder and adapted for operation by the carriage.

In testimony whereof I afliX my signature.

ARVI MESI. 

